I thought that recovery below min_size for EC pools wasn't expected to work until Octopus. From the Octopus release notes: "Ceph will allow recovery below min_size for Erasure coded pools, wherever possible." Josh On Tue, Mar 30, 2021 at 6:53 AM Frank Schilder <frans@xxxxxx> wrote: > Dear Rainer, > > hmm, maybe the option is ignored or not implemented properly. This option > set to true should have the same effect as reducing min_size *except* that > new writes will not go to non-redundant storage. When reducing min-size, a > critically degraded PG will accept new writes, which is the danger of > data-loss mentioned before and avoided if only recovery ops are allowed on > such PGs. > > Can you open a tracker about your observation that reducing min-size was > necessary and helped despite osd_allow_recovery_below_min_size=true? > > Best regards, > ================= > Frank Schilder > AIT Risø Campus > Bygning 109, rum S14 > > ________________________________________ > From: Rainer Krienke <krienke@xxxxxxxxxxxxxx> > Sent: 30 March 2021 13:30:00 > To: Frank Schilder; Eugen Block; ceph-users@xxxxxxx > Subject: Re: Re: ceph Nautilus lost two disk over night > everything hangs > > Hello Frank, > > the option is actually set. On one of my monitors: > > # ceph daemon /var/run/ceph/ceph-mon.*.asok config show|grep > osd_allow_recovery_below_min_size > "osd_allow_recovery_below_min_size": "true", > > Thank you very much > Rainer > > Am 30.03.21 um 13:20 schrieb Frank Schilder: > > Hi, this is odd. The problem with recovery when sufficiently many but > less than min_size shards are present should have been resolved with > osd_allow_recovery_below_min_size=true. It is really dangerous to reduce > min_size below k+1 and, in fact, should never be necessary for recovery. > Can you check if this option is present and set to true? If it is not > working as intended, a tracker ticker might be in order. > > > > Best regards, > > ================= > > Frank Schilder > > AIT Risø Campus > > Bygning 109, rum S14 > > > > -- > Rainer Krienke, Uni Koblenz, Rechenzentrum, A22, Universitaetsstrasse 1 > 56070 Koblenz, Web: http://www.uni-koblenz.de/~krienke, Tel: +49261287 > 1312 > PGP: http://www.uni-koblenz.de/~krienke/mypgp.html, Fax: +49261287 > 1001312 > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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